Recording device and method for efficient network personal video recorder manipulation through adaptive bit rate streaming

ABSTRACT

A recording device and a method are described herein that provide a network-based personal video recording service utilizing adaptive bit rate technology for a plurality of users. In operation, the recording device records at a minimum a single bit rate (one set of segmented files) of the broadcast content within each user&#39;s network personal video recorder storage unit. Plus, the recording device stores the other bit rates (remaining sets of segmented files) in a central storage location or some other storage location.

CLAIM OF PRIORITY

This application is a continuation application of U.S. patent application Ser. No. 14/035,665, filed Sep. 24, 2013, now pending, the contents of which are hereby incorporated by reference herein.

TECHNICAL FIELD

The present invention relates in general to a network-based personal video recording service and, in particular, to a recording device and a method for providing a network-based personal video recording service utilizing adaptive bit rate technology for a plurality of users.

BACKGROUND

The following abbreviations and terms are herewith defined, at least some of which are referred to within the following description of the state of the art and the present invention.

DVR Digital Video Recorder

Kbs Kilobytes per second

Mbs Megabytes per second

PVR Personal Video Recorder

VCR Video Cassette Recorder

Operators today provide a network-based PVR service which allows their customers to record broadcast content in network-based PVRs at will in a similar way that they can record broadcast content by using their non-network-based equivalents such as VCRs, DVRs and regular PVRs. In performing this network-based PVR service, the operators need to follow legal mandates (in the United States and elsewhere) which require that their network-based PVRs store one copy of the recorded content for each user. Such legal mandates can result in inefficiencies especially if the operators happened to utilize adaptive bit rate streaming technology to stream the recorded broadcast content to their users. In this case, the operators would likely keep multiple copies of the same recorded broadcast content each with a different bit rate in everyone of the network-based PVRs associated with each of the users that recorded the broadcast content. This would not be an efficient use of the storage capacity of the network-based PVRs. Hence, there is a need to address this problem and other problems associated with a network-based PVR service which utilizes adaptive bit rate technology to record and stream the recorded broadcast content to customers.

SUMMARY

A recording device and a method for providing a network-based personal video recording service which addresses the aforementioned problem and other problems are described in the independent claims of the present application. Advantageous embodiments of the recording device and method have been described in the dependent claims of the present application.

In one aspect, the present invention includes a recording device for providing a network-based personal video recording service for a plurality of users. The recording device comprises a plurality of PVR storage units, a processor, and a memory, wherein the processor interfaces with the memory and executes the processor-executable instructions stored therein to enable a receiving operation, a storing operation, a generating operation, and a sending operation. In the receiving operation, the recording device receives a record message from an end-user device associated with one user of the plurality of users, wherein the record message contains a request to record a broadcast content. In the storing operation, the recording device stores a plurality of sets of segmented files associated with the broadcast content, wherein each one of the sets of segmented files has a bitrate that is different than bitrates of the remaining sets of the segmented files. In the generating operation, the recording device generates a unique manifest for the one user, wherein the unique manifest has references to segmented files associated with (1) one of the sets of segmented files stored in one of the personal video recorder storage units associated with the one user, and (2) the remaining sets of segmented files stored in a storage unit other than the personal video recorder storage unit associated with the one user. In the sending operation, the recording device sends the unique manifest to the end-user device associated with the one user. The recording device is a marked-improvement over the prior art since the recording device stores one set of the segmented files (single bit rate) of the broadcast content within the PVR storage unit associated with the one user rather than having to store all the sets of the segmented files (multiple bit rates) within the PVR storage unit associated with the one user.

In another aspect, the present invention includes a method implemented by a recording device for providing a network-based personal video recording service for a plurality of users. The method comprises a receiving operation, a storing operation, a generating operation, and a sending operation. In the receiving operation, the recording device receives a record message from an end-user device associated with one user of the plurality of users, wherein the record message contains a request to record a broadcast content. In the storing operation, the recording device stores a plurality of sets of segmented files associated with the broadcast content, wherein each one of the sets of segmented files has a bitrate that is different than bitrates of the remaining sets of the segmented files. In the generating operation, the recording device generates a unique manifest for the one user, wherein the unique manifest has references to segmented files associated with (1) one of the sets of segmented files stored in one of the personal video recorder storage units associated with the one user, and (2) the remaining sets of segmented files stored in a storage unit other than the personal video recorder storage unit associated with the one user. In the sending operation, the recording device sends the unique manifest to the end-user device associated with the one user. The method is a marked-improvement over the prior art since the recording device stores one set of the segmented files (single bit rate) of the broadcast content within the PVR storage unit associated with the one user rather than having to store all the sets of the segmented files (multiple bit rates) within the PVR storage unit associated with the one user.

Additional aspects of the invention will be set forth, in part, in the detailed description, figures and any claims which follow, and in part will be derived from the detailed description, or can be learned by practice of the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as disclosed.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of the present invention may be obtained by reference to the following detailed description when taken in conjunction with the accompanying drawings:

FIG. 1A is a basic diagram of a recording device configured to provide a network-based personal video recording service for one or more users in accordance with an embodiment of the present invention;

FIG. 1B is a flowchart of a method implemented by the recording device shown in FIG. 1A to provide a network-based personal video recording service for one or more users in accordance with an embodiment of the present invention;

FIGS. 2A-2B are basic diagrams of a recording device configured to provide a network-based personal video recording service for one or more users in accordance with a first embodiment of the present invention;

FIG. 2C is a flowchart of a method implemented by the recording device shown in FIGS. 2A-2B to provide a network-based personal video recording service for one or more users in accordance with the first embodiment of the present invention;

FIG. 2D is a flowchart illustrating an exemplary method that can be performed by the recording device shown in FIGS. 2A-2B to start a storing process of the method shown in FIG. 2C in accordance with the first embodiment of the present invention;

FIG. 2E is a flowchart illustrating an exemplary method that can be performed by the recording device shown in FIGS. 2A-2B to stop the storing process of the method shown in FIG. 2C in accordance with the first embodiment of the present invention;

FIG. 2F is a flowchart illustrating an exemplary method that can be performed by the recording device shown in FIGS. 2A-2B to delete a recorded broadcast content per the method shown in FIG. 2C in accordance with the first embodiment of the present invention;

FIG. 2G1-2G3 is a flowchart illustrating an exemplary method that can be performed by the recording device shown in FIGS. 2A-2B to delete a recorded broadcast content per the method shown in FIG. 2C in accordance with the first embodiment of the present invention;

FIGS. 3A-3B are basic diagrams of a recording device configured to provide a network-based personal video recording service for one or more users in accordance with a second embodiment of the present invention;

FIG. 3C is a flowchart of a method implemented by the recording device shown in FIGS. 3A-3B to provide a network-based personal video recording service for one or more users in accordance with the second embodiment of the present invention;

FIGS. 4A-4B are basic diagrams of a recording device configured to provide a network-based personal video recording service for multiple users in accordance with a third embodiment of the present invention; and

FIG. 4C is a flowchart of a method implemented by the recording device shown in FIGS. 4A-4B to provide a network-based personal video recording service for multiple users in accordance with the third embodiment of the present invention.

DETAILED DESCRIPTION

Referring to FIGS. 1A-1B, there are respectively illustrated a basic diagram of a recording device 100 and a flowchart of a method 150 implemented by the recording device 100 to provide a network-based personal video recording service 102 for one or more users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with an embodiment of the present invention. In FIG. 1A, the recording device 100 is shown as being part of a broadcast network 106 (e.g., cable-based content delivery network 106, internet-based content delivery network 106, satellite-based content delivery network 106) that utilizes adaptive bit rate technology to deliver broadcast content to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). The content delivery network 106 includes many well-known components which are used to deliver (stream) different broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) but only two of these known components namely an adaptive bit rate encoder 108 and a segmenting device 110 which are useful in helping to describe the network-based personal video recording service 102 of the present invention are discussed and shown herein.

The adaptive bit rate encoder 108 is configured to receive a broadcast content 112 (e.g., channel Z with a resolution of 1920×1080 at 15 Mbs) and generate multiple files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ (for example) of the same video and audio content but which are encoded at different bit rates. In this example, the adaptive bit rate encoder 108 receives the broadcast content 112 (1920×1080 15 Mbs) and outputs a 1920×1080 10 Mbs file 114 ₁, a 1920×1080 9 Mbs file 114 ₂, a 1920×1080 8 Mbs file 114 ₃, a 1280×720 5 Mbs file 114 ₄, a 1280×720 4 Mbs file 114 ₅, a 1280×720 3 Mbs file 114 ₆, a 720×480 2.2 Mbs file 114 ₇, a 720×480 1.8 Mbs file 114 ₈, a 720×480 1.4 Mbs file 114 ₉, a 640×360 900 Kbs file 114 ₁₀, a 400×224 600 Kbs file 114 ₁₁, and a 400×224 300 Kbs file 114 ₁₂. For clarity, only one broadcast content 112 (e.g., channel Z) is shown and described herein.

The segmenting device 110 is configured to receive the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ and then segment each of the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ into multiple segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n). Each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) contains video and audio packets for a predetermined time duration (e.g., 10 seconds). It should be appreciated that the segmented files 116 _(a1-n) have a higher quality (higher bit rate) than segmented files 116 _(b1-n) which in turn have a higher quality (higher bit rate) than segmented files 116 _(c1-n) and so on where the segmented files 116 _(l1-n) have the lowest quality (lowest bit rate). The recording device 100 receives the multiple sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) from the segmenting device 110. A detailed description is provided next on how the recording device 100 is configured to store these segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) in order provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with an embodiment of the present invention.

The recording device 100 is shown as having a processor 118, a memory 120, multiple PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) and an optional general storage unit 124. The recording device 100 can have additional well-known components but for clarity only the components needed to explain the present invention are described herein. The recording device 100 is configured such that the processor 118 interfaces with the memory 120 and executes processor-executable instructions stored in the memory 120 to enable the following operations:

1. Receiving a record message 126 ₁ from an end-user device 128 ₁ (e.g., set-top-box computer, laptop computer, mobile phone (smart phone), tablet, internet capable television) associated with user 104 ₁ (for example)(see FIG. 1B's receiving step 152). The record message 126 ₁ contains a request to record the broadcast content 112.

2. Storing multiple sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) associated with the broadcast content 112 (see FIG. 1B's storing step 154). The various storage locations in which the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) can be stored are discussed in step 3. In addition, FIGS. 2-4's descriptions explain three exemplary ways and various locations where the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) can be stored to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n).

3. Generating a unique manifest 130 ₁ (or similar document) for the user 104 ₁ (see FIG. 1B's generating step 156). The unique manifest 130 ₁ has an individual reference 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in a storage unit 122 ₂, 122 ₃ . . . 122 _(n) or 124 other than the PVR storage unit 122 ₁ associated user 104 ₁. As discussed in FIGS. 2-3 (first and second embodiments of present invention), the recording device 100 would store the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) in the general storage unit 124. And, as discussed in FIG. 4 (third embodiment of present invention), the recording device 100 would store the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) in one of the other PVR storage units 122 ₂ (for example) associated with one of the other users 104 ₂ (for example). In addition, FIGS. 2-4's descriptions explain some exemplary ways the manifest file 130 ₁ and other manifest files 130 ₂, 130 ₃ . . . 130 _(n) can be generated in order to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n).

4. Sending the unique manifest 130 ₁ to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 1B's sending step 158).

5. Receiving a play-back message 136 from the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 1B's receiving step 160). The play-back message 136 includes one of the references 132 ₁ (for example) in the unique manifest 130 ₁.

6. Using the one reference 132 ₁ in the play-back message 136 to retrieve a corresponding segmented file 116 _(a1) (for example) from the PVR storage unit 122 ₁ associated with user 104 ₁ or from the storage unit 122 ₂, 122 ₃ . . . 122 _(n) and 124 depending on which storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) and 124 is actually storing the requested segmented file 116 _(a1) (see FIG. 1B's using step 162). In this example, the segmented file 116 _(a1) would be retrieved from the general storage unit 124 (for example) rather than from the PVR storage unit 122 ₁ associated with user 104 ₁. This is a marked-improvement over the prior art since the PVR storage unit 122 ₁ no longer has to store all of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n).

7. Sending the retrieved segmented file 116 _(a1) to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 1B's sending step 164).

8. Repeating the second receiving operation (step 5), the using operation (step 6), and the second sending operation (7) to provide in a sequential manner the requested segmented files 116 _(b2), 116 _(b3), 116 _(c4), 116 _(k5) . . . 116 _(jn) (for example) of the recorded broadcast content 112 to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 1B's repeating step 166).

9. Deleting the (1) one set of segmented files 116 _(l1-n) (for example) stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in a storage unit 122 ₂, 122 ₃ . . . 122 _(n) or 124 other than the PVR storage unit 122 ₁ associated with user 104 ₁ after receiving a delete request 139 ₁ from user 104 ₁ (see FIG. 1B's deleting step 168). Exemplary ways that this deleting step could be performed are discussed below in the descriptions associated with FIGS. 2-4.

Note: The description above relates to providing the network-based personal video recording service 102 for one user 104 ₁ but it should be appreciated that the same steps can be performed by the recording device 100 to provide the network-based personal video recording service 102 for any number of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) each of which have their own end-user device 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) and each of which can record the same broadcast content 112 (e.g., channel Z) or different broadcast content (e.g., channels A-Y) at the same or different times.

It should be appreciated that there a many ways one could configure the recording device 100 so as to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) based on the teachings that have described in FIGS. 1A-1B. In this regard, FIGS. 2-4 provide three exemplary ways that the recording device 100 can be configured and operated so as to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with different embodiments of the present invention.

First Embodiment (FIGS. 2A-2G): The recording device 100 a operates to store a single bit rate (e.g., segmented files 116 ₁₁n most likely the ones which have the lowest bit rate) of the broadcast content 112 into each individual network PVR storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) per the requests in the record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n) of the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). At the same time, the recording device 100 a operates such that as long as one user 104 ₁ (for example) has initiated a recording of the broadcast content 112 to record all other bitrates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n)) of the broadcast content 112 within the general storage unit 124. The recording device 100 a also generates and stores the individual user's unique manifests 130 ₁, 130 ₂, 130 ₃ . . . 130 _(n) within the individual user's network PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). For instance, the network PVR storage unit 122 ₁ would store manifest 130 ₁ for user 104 ₁, while the network PVR storage unit 122 ₂ would store manifest 130 ₂ for user 104 ₂ and so on. The manifests 130 ₁, 130 ₂, 130 ₃ . . . 130 _(n) are specific to the corresponding users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n), where each manifest 130 ₁, 130 ₂, 130 ₃ . . . 130 _(n) references the respective user's personal bit rate (segmented files 116 _(l1-n)), as well as the general bitrates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n)) whose time codes are synchronized to the corresponding personal bit rate. This time code synchronization of the general bit rates is done so the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) cannot watch general broadcast content 112 which they do not also have a local copy recorded in their respective network PVR storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). Should no users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) be currently recording the broadcast content 112, then the recording device 100 a does not record anything in the general storage unit 124. Should a user 104 ₁ (for example) delete their recording, then the recording device 100 a would delete that user's personal manifest 130 ₁ and their single bit rate (segmented files 116 _(l1-n)) stored in their network PVR storage unit 122 ₁. Additionally, the recording device 100 a checks to see if that user 104 ₁ has permission for recorded segments in the general storage unit 124 that no other user 104 ₂, 104 ₃ . . . 104 _(n) can access. If so, the recording device 100 deletes those segments as well (since no one will be able to view them anymore). An advantage of the first embodiment is that it allows both user initiated recording and prescheduled recording to be handled by the recording device 100 a.

Second Embodiment (FIGS. 3A-3C): The second embodiment is the same as the first embodiment except that the recording device 100 b is always capturing and storing general bitrates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n)) of the broadcast content 112 in the general storage unit 124 regardless of whether or not any of the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) have requested to record the broadcast content 112. Basically, the recording device 100 b is configured to record the broadcast content 112 at a single bit rate (most likely lowest bit rate available) for each user 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) who wishes to record it within their respective network PVR storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). And, prior to this time, the recording system 100 b has been recording the remaining bitrates if not all of the bitrates of the broadcast content 112 in the general storage unit 124. Thus, when a user 104 ₁ (for example) attempts to stream their recorded broadcast content 112, the recording device 100 b sends the user 104 ₁ their unique manifest 130 ₁ (or similar document) which contains references 132 _(1-x) to all of the segmented files (bit rates) of the recorded broadcast content 112. The user 104 ₁ can then use their unique manifest 130 ₁ to access either their personally stored single bit rate (segmented files 116 _(l1-n)) or the generally stored bit rates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n)).

Third Embodiment (FIGS. 4A-4C): The recording device 100 c can record all bitrates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), 116 _(l1-n)) for each user 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in their respective network PVR storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). When a specific user 104 ₁ (for example) indicates that they would like to stop recording, then the recording device 100 ends their personal recording. After all users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) have finished recording, then the recording device 100 c determines which user 104 ₂ (for example) has the “most complete” recording, and deletes everyone else's “extra” bitrates (leaving at least a single bit rate) in their respective network PVR storage unit 122 ₁, 122 ₃, . . . 122 _(n). Then, when a user 104 ₁ (for example) wants to play the recorded broadcast content 112, that user 104 ₁ is provided a manifest 130 ₁ with references to the “most complete” recording of the broadcast content 112 within the network PVR storage unit 122 ₂ of user 104 ₂ (for example) and the one bit rate (e.g., segmented files 116 _(l1-n)) within the network PVR storage unit 122 ₁ of user 104 ₁. As can be appreciated, the user 104 ₂ (for example) which has the “most” complete recording will be provided a “normal” manifest 130 ₂ while the remaining users 104 ₁, 104 ₃ . . . 104 _(n) will be respectively provided “unique” manifests 130 ₁, 130 ₃ . . . 130 _(n) which reference a patchwork of network PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). Should that recording be deleted by user 104 ₂, the recording device 100 nevertheless will save that recording so long as any other user 104 ₁, 104 ₃ . . . 104 _(n) has a single bit rate recording left for it in their network PVR storage units 122 ₁, 122 ₃ . . . 122 _(n).

Referring to FIGS. 2A-2B, there are respectively illustrated a basic diagram of a recording device 100 a and a flowchart of a method 200 c implemented by the recording device 100 a to provide the network-based personal video recording service 102 for one or more users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the first embodiment of the present invention. In FIG. 2A, the recording device 100 a is shown as being a part of a broadcast network 106 (e.g., cable-based content delivery network 106, internet-based content delivery network 106, satellite-based content delivery network 106) that utilizes adaptive bit rate technology to deliver broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). The content delivery network 106 includes many well-known components which are used to deliver (stream) broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) but only two of these known components namely an adaptive bit rate encoder 108 and a segmenting device 110 which are useful in helping to describe the network-based personal video recording service 102 are discussed and shown herein.

The adaptive bit rate encoder 108 is configured to receive the broadcast content 112 (e.g., channel Z with a resolution of 1920×1080 at 15 Mbs) and generate multiple files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ (for example) of the same video and audio content but which are encoded at different bit rates. In this example, the adaptive bit rate encoder 404 receives the broadcast content 112 (1920×1080 15 Mbs) and outputs a 1920×1080 10 Mbs file 114 ₁, a 1920×1080 9 Mbs file 114 ₂, a 1920×1080 8 Mbs file 114 ₃, a 1280×720 5 Mbs file 114 ₄, a 1280×720 4 Mbs file 114 ₅, a 1280×720 3 Mbs file 114 ₆, a 720×480 2.2 Mbs file 114 ₇, a 720×480 1.8 Mbs file 114 ₈, a 720×480 1.4 Mbs file 114 ₉, a 640×360 900 Kbs file 114 ₁₀, a 400×224 600 Kbs file 114 ₁₁, and a 400×224 300 Kbs file 114 ₁₂.

The segmenting device 110 is configured to receive the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ and then segment each of the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ into multiple segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n). Each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) contains video and audio packets for a predetermined time duration (e.g., 10 seconds). It should be appreciated that the segmented files 116 _(a1-n) have a higher quality (higher bit rate) than segmented files 116 _(b1-n) which in turn have a higher quality (higher bit rate) than segmented files 116 _(c1-n) and so on where the segmented files 116 _(l1-n) have the lowest quality (lowest bit rate). The recording device 100 a receives the multiple sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) from the segmenting device 110. A detailed description is provided next on how the recording device 100 a is configured to store these segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the first embodiment of the present invention.

The recording device 100 a is shown as having a processor 118, a memory 120, multiple PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) and the general storage unit 124. The recording device 100 a can have additional well-known components but for clarity only the components needed to explain the present invention are described herein. The recording device 100 a is configured such that the processor 118 interfaces with the memory 120 and executes processor-executable instructions stored in the memory 120 to enable the following operations:

1. Receiving a record message 126 ₁ from an end-user device 128 ₁ (e.g., set-top-box computer, laptop computer, mobile phone (smart phone), tablet, internet capable television) associated with user 104 ₁ (for example)(see FIG. 2C's receiving step 202 c). In practice, the recording device 100 a would receive record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n) from the end-user devices 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) (e.g., set-top-box computers, laptop computers, mobile phones (smart phones), tablets, internet capable televisions) respectively associated with users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). In this example, the record message 126 ₁ contains a request to record the broadcast content 112 from 9:00 AM-9:30 AM for user 104 ₁. The record message 126 ₂ contains a request to record the broadcast content 112 from 9:00 AM-9:45 AM. The record message 126 ₃ contains a request to record the broadcast content 112 from 9:20 AM-9:30 AM. And, the record message 126 _(n) contains a request to record the broadcast content 112 from 9:08 AM-??.??, where the user 104 _(n) selected the record button on channel Z (broadcast content 112) at 9:08 AM and ??.?? is when the user 104 _(n) selects the stop button. In one embodiment, the recording device 100 a can receive a “prescheduled” record message 126 ₁ from user 104 ₁ (or any other user 104 ₂, 104 ₃ . . . 104 _(n)) where the “prescheduled” record message 126 ₁ contains a request to record the broadcast content 112 in the future by indicating a particular start time and a particular end time.

2. Storing one of the sets of segmented files 116 _(l1-n) (e.g., the lowest bit rate) in the network PVR storage unit 122 ₁ associated with user 104 ₁ (see FIG. 2C's receiving step 204 c 1). In this example, the segmented files 116 _(l1-n) are stored in the network PVR storage unit 122 ₁ associated with user 104 ₁ from 9:00 AM-9:30 AM. In addition, the recording device 100 a would store the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) of the broadcast content 112 in the general storage unit 124 if they are not already being stored therein (see FIG. 2Cs storing step 204 c 2). In this example, the recording device 100 a begins to store the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) of the broadcast content 112 in the general storage unit 124 at 9:00 AM. Plus, the recording device 100 a stores the segmented files 116 _(l1-n) in the network PVR storage unit 122 ₂ associated with user 104 ₂ from 9:00 AM-9:45 AM. In addition, the recording device 100 a stores the segmented files 116 _(l1-n) in the network PVR storage unit 122 ₃ associated with user 104 ₃ from 9:20 AM-9:30 AM. The recording device 100 a also stores the segmented files 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n) from 9:08 AM-??.??. Once, user 104 _(n) stops the recording of the broadcast content 112 assuming it is after 9:45 AM then the recording device 100 a stops storing the segmented files 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n) and stops storing the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) in the general storage unit 124.

3. Generating a unique manifest 130 ₁ for the user 104 ₁ (see FIG. 2C's generating step 206 c). The unique manifest 130 ₁ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. In this example, the recording device 100 a also generates a unique manifest 130 ₂ for user 104 ₂, where the unique manifest 130 ₂ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 ₂ associated with user 104 ₂, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. In addition, the recording device 100 a generates a unique manifest 130 ₃ for user 104 ₃, where the unique manifest 130 ₃ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 ₃ associated with user 104 ₃, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. The recording device 100 a also generates a unique manifest 130 _(n) for user 104 _(n), where the unique manifest 130 _(n) has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 _(n) associated with user 104 _(n), and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. The unique manifests 130 ₁, 130 ₂, 130 ₃ . . . 130 _(n) each have individual references 132 _(1-x) to each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) associated with the broadcast content 112 for time periods of 9:00 AM-9:30 AM for user 104 ₁, 9:00 AM-9:45 AM for user 104 ₂, 9:20 AM-9:30 AM for user 104 ₃, and 9:08 AM-??.?? for user 104 _(n), respectively.

4. Sending the unique manifest 130 ₁ to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 2C's sending step 208 c). In this example, the recording device 100 a also sends unique manifests 130 ₂, 130 ₃ . . . 130 _(n) to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) (note: the unique manifest 130 _(n) would be sent to user 104 _(n) upon the completion of the recording process which is when user 104 _(n) stops the recording). FIG. 2A graphically illustrates steps 1-4 while FIG. 2B graphically illustrates the following steps 5-8.

5. Receiving a play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 2C's receiving step 210 c). The play-back message 136 ₁ includes one of the references 132 ₁ (for example) in the unique manifest 130 ₁. FIG. 2B illustrates the recording device 100 a receiving the play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁. For clarity, the recording device 100 a shown in FIG. 2B does not illustrate the recording device 100 a receiving play-back messages 136 ₂, 136 ₃ . . . 136 _(n) from end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). In addition, FIG. 2B does not illustrate the recording device 100 a interacting with and streaming the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). However, it should be appreciated that the recording device 100 a interacts with and streams the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) in the same manner as it does with user 104 ₁.

6. Using the one reference 132 ₁ in the play-back message 136 ₁ to retrieve a corresponding segmented file 116 _(a1) (for example) from either the PVR storage unit 122 ₁ associated with user 104 ₁ or from the general storage unit 124 depending on which storage unit 122 ₁ or 124 is actually storing the requested segmented file 116 _(a1) (see FIG. 2C's using step 212 c). In this example, the recording device 100 a would retrieve the segmented file 116 _(a1) from the general storage unit 124 since it is not stored in the PVR storage unit 122 ₁ associated with user 104 ₁. This is a marked-improvement over the prior art since the PVR storage unit 122 ₁ no longer has to store all of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n).

7. Sending the retrieved segmented file 116 _(a1) to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 2C's sending step 214 c).

8. Repeating the second receiving operation (step 5) by receiving play-back messages 136 ₂, 136 ₃, 136 ₄ . . . 136 _(n) with references 132 ₂, 132 ₃, 132 ₄ . . . 132 _(n), the using operation (step 6) to retrieve segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) (for example), and the second sending operation (step 7) by sending the retrieved segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) of the broadcast content 112 in a sequential manner to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 2C's repeating step 216 c).

9. Deleting the (1) one set of segmented files 116 _(l1-n) (for example) stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124 after receiving a delete request 139 ₁ from user 104 ₁ (see FIG. 2C's deleting step 218 c).

Note: The description above with respect to steps 5-9 relates to providing the network-based personal video recording service 102 for one user 104 ₁ but it should be appreciated that the same steps can be performed by the recording device 100 a to provide the network-based personal video recording service 102 for any number of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) each of which have their own end-user device 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) and each of which can record the same broadcast content 112 (e.g., channel Z) or different broadcast content (e.g., channels A-Y) at the same time or different times.

Referring to FIG. 2D, there is shown a basic flowchart illustrating an exemplary method 200 d that can be performed by the recording device 100 a to start the storing process in accordance with the first embodiment of the present invention (see the aforementioned step 3 and FIG. 2C's storing step 204 c). In the beginning step 202 d, the recording device 100 a upon receiving a record message 126 _(x) (which can be anyone of record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n)) from user 104 _(x) (which can be anyone of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n)) determines if the broadcast content 112 is currently being stored in the general storage unit 124 (e.g., determine if general recording count >0 for broadcast content 112 which if yes means more than one other user 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) is already recording the broadcast content 112). If the result of the determining step 202 d is no, beginning at step 204 d to store the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) of the broadcast content 112 in the general storage unit 124. After step 204 d or if a result of the determining step 202 d is yes, beginning at step 206 d to store the one set of segmented files 116 _(l1-n) in the network PVR 122 _(x) associated with user 104 _(x). After the beginning step 206 d, incrementing at step 208 d the general recording count for the broadcast content 112 to indicate the actual number of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) who are currently recording the broadcast content 112. At the end of step 208 d, the recording device 100 a would begin generating the unique manifest 130 _(x) for user 104 _(x) as discussed about in step 4 and FIG. 2C's step 206 c.

Referring to FIG. 2E, there is shown a basic flowchart illustrating an exemplary method 200 e that can be performed by the recording device 100 a to stop the storing process in accordance with the first embodiment of the present invention (see the aforementioned step 3 and FIG. 2C's storing step 204 c). In the beginning step 202 e, the recording device 100 a after an end time has been reached for recording the broadcast content 112 for a user 104 _(x) (which can be anyone of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n)) determines if a general recording count is at one indicating that user 104 _(x) is the only user that was recording the broadcast content 112. If the result of the determining step 202 e is yes, the recording device 100 a at step 204 e stops the storing of the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) in the general storage unit 124. After the stopping step 204 e or if the result of the determining step 202 e is no, the recording device 100 a at step 206 e stops the storing of the one set of segmented files 116 _(l1-n) in the network PVR storage unit 122 _(x) of user 104 _(x). After the stopping step 206 e, the recording device 100 a at step 208 e stops the generation of the unique manifest 130 _(x) for user 104 _(x), and then the recording device 100 a at step 210 e decrements the general recording count by one for the broadcast content 112. If desired, the recording device 100 a can perform step 210 e before performing step 208 e.

Referring to FIG. 2F, there is shown a basic flowchart illustrating an exemplary method 200 f that can be performed by the recording device 100 a to delete a recorded broadcast content 112 in accordance with the first embodiment of the present invention (see the aforementioned step 9 and FIG. 2C's deleting step 218 c). At step 202 f, the recording device 100 a receives a delete request 139 _(x) from user 104 _(x), (which can be anyone of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n)). The delete message 139 _(x) contains a request to delete the recorded broadcast content 112 associated with user 104 _(x). At step 204 f, the recording device 100 a deletes the unique manifest 130 _(x) of user 104 _(x). At step 206 f, the recording device 100 a deletes the segmented files 116 _(l1-n) associated with the recorded broadcast content 112 stored in the network PVR 122 _(x) associated with user 104 _(x). At step 208 f, the recording device 100 a determines if user 104 _(x), has permission for segmented files associated with the recorded broadcast content 122 stored in the general storage unit 124 that none of the remaining users can access. If the result of the determining step 208 f is yes, then the recording device 100 a at step 210 f deletes those stored segmented files in the general storage unit 124 that none of the remaining users can access. If the result of the determining step 208 f is no, then the recording device 100 a at step 212 f does not delete those stored segmented files in the general storage unit 124 that none of the remaining users can access.

Referring to FIG. 2G1-2G3, there is shown a basic flowchart illustrating an exemplary method 200 g that can be performed by the recording device 100 a to delete a recorded broadcast content 112 in accordance with the first embodiment of the present invention (see the aforementioned step 9 and FIG. 2C's deleting step 218 c). In the beginning at step 202 g, the recording device 100 a receives a delete request 139 _(x) from user user 104 _(x) (which can be anyone of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n)). The delete message 139 _(x) contains a request to delete the recorded broadcast content 112 associated with user 104 _(x). At step 204 g, the recording device 100 a retrieves the recorded broadcast content 112's start and end times. At step 206 g, the recording device 100 a generates a list of all general recorded segmented files for user 104 _(x)'s recording start and end times in the general storage unit 124. At step 208 g, the recording device 100 a generates a list of a all recordings from all users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) (not including user 104 _(x)) that include an overlap time between user 104 _(x)'s start and end times for the recorded broadcast content 112. At step 210 g, the recording device 100 a determines if the overlapping user's recordings list is empty. If the result of step 210 g is no, then the recording device 100 a at steps 212 g, 214 g and 216 g respectively retrieves the first overlapping user's recording from all user's overlapping recording lists, retrieves the first segment in user 104 x's list of general recorded segments, and retrieves the first segment from overlapping user's (not user 104 _(x)) general recorded segments. Then, the recording device 100 a at step 218 g determines if user 104 _(x)'s segment is same as overlapping user's segment. If the result of step 218 g is yes, then the recording device 100 a at step 220 g removes the segment file from user 104 _(x)'s list of general recorded segments. After step 220 g or if the result of step 218 g is no, the recording device 100 a at step 222 g determines if at end of user's (non user 104 _(x)) overlapping segments. If the result of step 222 g is no, then the recording device 100 a at step 224 g determines if list of general recorded segments for user 104 _(x) is empty. If the result of step 224 g is no, then the recording device 100 a at step 226 g retrieves the next segment from the general user's (non user 104 _(x)) recorded broadcast content 112 and then proceeds back to step 218 g. If the result of step 224 g is yes, then the recording device 100 a at step 228 g deletes user 104 _(x)'s local segments and manifest 130 _(x) for the recorded broadcast content 112 between start and end. Then, the recording device 100 a at step 230 g deletes the recorded broadcast content 112 from the list of other recorded broadcast content. If the result of step 222 g is yes, then the recording device 100 a at step 232 g determines if at end of overlapping user's recording list. If the result of step 232 g is no, then the recording device 100 a at step 234 g gets next overlapping user's recording from all user's overlapping recording lists and then proceeds back to step 214 g. If the result of step 232 g is yes or the result of step 210 g is yes, then the recording device 100 a at step 236 g retrieves the first segment in user 104 _(x)'s list of general recorded segments. Then, the recording device 100 a at step 238 g deletes the segment file from general recorded segments. Thereafter, the recording device 100 a at step 240 g determines if at end of user 104 _(x)'s list of general recorded segments. If the result of step 240 g is no, the recording device 100 a at step 242 g retrieves the next segment file from general recorded segments and proceeds to step 238 g. If the result of step 240 g is yes, then the recording device 100 a proceeds to step 228 g.

Referring to FIGS. 3A-3C, there are respectively illustrated a basic diagram of a recording device 100 b and a flowchart of a method 300 implemented by the recording device 100 b to provide the network-based personal video recording service 102 for one or more users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the second embodiment of the present invention. In FIG. 3A, the recording device 100 b is shown as being a part of a broadcast network 106 (e.g., cable-based content delivery network 106, internet-based content delivery network 106, satellite-based content delivery network 106) that utilizes adaptive bit rate technology to deliver broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). The content delivery network 106 includes many well-known components which are used to deliver (stream) broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) but only two of these known components namely an adaptive bit rate encoder 108 and a segmenting device 110 which are useful in helping to describe the network-based personal video recording service 102 are discussed and shown herein.

The adaptive bit rate encoder 108 is configured to receive the broadcast content 112 (e.g., channel Z with a resolution of 1920×1080 at 15 Mbs) and generate multiple files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ (for example) of the same video and audio content but which are encoded at different bit rates. In this example, the adaptive bit rate encoder 404 receives the broadcast content 112 (1920×1080 15 Mbs) and outputs a 1920×1080 10 Mbs file 114 ₁, a 1920×1080 9 Mbs file 114 ₂, a 1920×1080 8 Mbs file 114 ₃, a 1280×720 5 Mbs file 114 ₄, a 1280×720 4 Mbs file 114 ₅, a 1280×720 3 Mbs file 114 ₆, a 720×480 2.2 Mbs file 114 ₇, a 720×480 1.8 Mbs file 114 ₈, a 720×480 1.4 Mbs file 114 ₉, a 640×360 900 Kbs file 114 ₁₀, a 400×224 600 Kbs file 114 ₁₁, and a 400×224 300 Kbs file 114 ₁₂.

The segmenting device 110 is configured to receive the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ and then segment each of the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ into multiple segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n). Each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) contains video and audio packets for a predetermined time duration (e.g., 10 seconds). It should be appreciated that the segmented files 116 _(a1-n) have a higher quality (higher bit rate) than segmented files 116 _(b1-n) which in turn have a higher quality (higher bit rate) than segmented files 116 _(c1-n) and so on where the segmented files 116 _(l1-n) have the lowest quality (lowest bit rate). The recording device 100 b receives the multiple sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) from the segmenting device 110. A detailed description is provided next on how the recording device 100 b is configured to store these segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the second embodiment of the present invention.

The recording device 100 b is shown as having a processor 118, a memory 120, multiple PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) and the general storage unit 124. The recording device 100 b can have additional well-known components but for clarity only the components needed to explain the present invention are described herein. The recording device 100 b is configured such that the processor 118 interfaces with the memory 120 and executes processor-executable instructions stored in the memory 120 to enable the following operations:

1. Receiving a record message 126 ₁ from an end-user device 128 ₁ (e.g., set-top-box computer, laptop computer, mobile phone (smart phone), tablet, internet capable television) associated with user 104 ₁ (for example)(see FIG. 3C's receiving step 302 c). In practice, the recording device 100 b would receive record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n) from the end-user devices 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) (e.g., set-top-box computers, laptop computers, mobile phones (smart phones), tablets, internet capable televisions) respectively associated with users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). In this example, the record message 126 ₁ contains a request to record the broadcast content 112 from 9:00 AM-9:30 AM for user 104 ₁. The record message 126 ₂ contains a request to record the broadcast content 112 from 9:00 AM-9:45 AM. The record message 126 ₃ contains a request to record the broadcast content 112 from 9:20 AM-9:30 AM. And, the record message 126 _(n) contains a request to record the broadcast content 112 from 9:08 AM-??.??, where the user 104 _(n) selected the record button on channel Z (broadcast content 112) at 9:08 AM and ??.?? is when the user 104 _(n) selects the stop button. In one embodiment, the recording device 100 b can receive a “prescheduled” record message 126 ₁ from user 104 ₁ (or any other user 104 ₂, 104 ₃ . . . 104 _(n)) where the “prescheduled” record message 126 ₁ contains a request to record the broadcast content 112 in the future by indicating a particular start time and a particular end time.

2. Storing one of the sets of segmented files 116 _(l1-n) (e.g., the lowest bit rate) in the network PVR storage unit 122 ₁ associated with user 104 ₁ (see FIG. 3C's receiving step 304 c 1). In this example, the segmented files 116 _(l1-n) are stored in the network PVR storage unit 122 ₁ associated with user 104 ₁ from 9:00 AM-9:30 AM. In addition, the recording device 100 b would have already been storing the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) (Or all of the sets of segmented files) of the broadcast content 112 in the general storage unit 124 (see FIG. 3Cs storing step 304 c 2). In particular, the recording device 100 b always stores the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) of the broadcast content 112 in the general storage unit 124 regardless of whether or not a record message 126 _(x) (anyone of the record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n)) is received from an end-user device 128 _(x) (anyone of the end-user devices 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n)) of a user 104 _(x) (anyone of the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n)). In this example, the recording device 100 b would have been storing the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) (or all of the sets of segmented files) of the broadcast content 112 in the general storage unit 124 prior to 9:00 AM. Plus, the recording device 100 b would store the segmented files 116 _(l1-n) in the network PVR storage unit 122 ₂ associated with user 104 ₂ from 9:00 AM-9:45 AM. In addition, the recording device 100 b stores the segmented files 116 _(l1-n) in the network PVR storage unit 122 ₃ associated with user 104 ₃ from 9:20 AM-9:30 AM. The recording device 100 b also stores the segmented files 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n) from 9:08 AM-??.??. Once, user 104 _(n) stops the recording of the broadcast content 112 assuming it is after 9:45 AM then the recording device 100 b stops storing the segmented files 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n) but would continue storing the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) (or all of the sets of segmented files) in the general storage unit 124.

3. Generating a unique manifest 130 ₁ for the user 104 ₁ (see FIG. 3C's generating step 306 c). The unique manifest 130 ₁ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. In this example, the recording device 100 b also generates a unique manifest 130 ₂ for user 104 ₂, where the unique manifest 130 ₂ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 ₂ associated with user 104 ₂, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. In addition, the recording device 100 b generates a unique manifest 130 ₃ for user 104 ₃, where the unique manifest 130 ₃ has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 ₃ associated with user 104 ₃, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. The recording device 100 b also generates a unique manifest 130 _(n) for user 104 _(n), where the unique manifest 130 _(n) has individual references 132 _(1-x) to each of the segmented files associated with (1) one of the sets of segmented files 116 _(l1-n) (for example) which are stored in the network PVR storage unit 122 _(n) associated with user 104 _(n), and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124. The unique manifests 130 ₁, 130 ₂, 130 ₃ . . . 130 _(n) each have individual references 132 _(1-x) to each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) associated with the broadcast content 112 for time periods of 9:00 AM-9:30 AM for user 104 ₁, 9:00 AM-9:45 AM for user 104 ₂, 9:20 AM-9:30 AM for user 104 ₃, and 9:08 AM-??.?? for user 104 _(n), respectively.

4. Sending the unique manifest 130 ₁ to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 3C's sending step 308 c). In this example, the recording device 100 b also sends unique manifests 130 ₂, 130 ₃ . . . 130 _(n) to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) (note: the unique manifest 130 _(n) would be sent to user 104 _(n) upon the completion of the recording process which is when user 104 _(n) stops the recording). FIG. 3A graphically illustrates steps 1-4 while FIG. 3B graphically illustrates the following steps 5-8.

5. Receiving a play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 3C's receiving step 310 c). The play-back message 136 ₁ includes one of the references 132 ₁ (for example) in the unique manifest 130 ₁. FIG. 3B illustrates the recording device 100 b receiving the play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁. For clarity, the recording device 100 a shown in FIG. 3B does not illustrate the recording device 100 a receiving play-back messages 136 ₂, 136 ₃ . . . 136 _(n) from end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). In addition, FIG. 3B does not illustrate the recording device 100 a interacting with and streaming the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). However, it should be appreciated that the recording device 100 a interacts with and streams the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) in the same manner as it does with user 104 ₁.

6. Using the one reference 132 ₁ in the play-back message 136 ₁ to retrieve a corresponding segmented file 116 _(a1) (for example) from either the PVR storage unit 122 ₁ associated with user 104 ₁ or from the general storage unit 124 depending on which storage unit 122 ₁ or 124 is actually storing the requested segmented file 116 _(a1) (see FIG. 3C's using step 312 c). In this example, the recording device 100 b would retrieve the segmented file 116 _(a1) from the general storage unit 124 since it is not stored in the PVR storage unit 122 ₁ associated with user 104 ₁. This is a marked-improvement over the prior art since the PVR storage unit 122 ₁ no longer has to store all of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n).

7. Sending the retrieved segmented file 116 _(a1) to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 3C's sending step 314 c).

8. Repeating the second receiving operation (step 5) by receiving play-back messages 136 ₂, 136 ₃, 136 ₄ . . . 136 _(n) with references 132 ₂, 132 ₃, 132 ₄ . . . 132 _(n), the using operation (step 6) to retrieve segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) (for example), and the second sending operation (step 7) by sending the retrieved segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) of the broadcast content 112 in a sequential manner to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 3C's repeating step 316 c).

9. Deleting the (1) one set of segmented files 116 _(l1-n) (for example) stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the general storage unit 124 after receiving a delete request 139 ₁ from user 104 ₁ (see FIG. 3C's deleting step 318 c).

Note: The description above relates to providing the network-based personal video recording service 102 for one user 104 ₁ but it should be appreciated that the same steps can be performed by the recording device 100 b to provide the network-based personal video recording service 102 for any number of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) each of which have their own end-user device 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) and each of which can record the same broadcast content 112 (e.g., channel Z) or different broadcast content (e.g., channels A-Y) at the same time or different times.

Referring to FIGS. 4A-4C, there are respectively illustrated a basic diagram of a recording device 100 c and a flowchart of a method 400 implemented by the recording device 100 c to provide the network-based personal video recording service 102 for one or more users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the third embodiment of the present invention. In FIG. 4A, the recording device 100 c is shown as being a part of a broadcast network 106 (e.g., cable-based content delivery network 106, internet-based content delivery network 106, satellite-based content delivery network 106) that utilizes adaptive bit rate technology to deliver broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). The content delivery network 106 includes many well-known components which are used to deliver (stream) broadcast content (multiple channels) to the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) but only two of these known components namely an adaptive bit rate encoder 108 and a segmenting device 110 which are useful in helping to describe the network-based personal video recording service 102 are discussed and shown herein.

The adaptive bit rate encoder 108 is configured to receive the broadcast content 112 (e.g., channel Z with a resolution of 1920×1080 at 15 Mbs) and generate multiple files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ (for example) of the same video and audio content but which are encoded at different bit rates. In this example, the adaptive bit rate encoder 404 receives the broadcast content 112 (1920×1080 15 Mbs) and outputs a 1920×1080 10 Mbs file 114 ₁, a 1920×1080 9 Mbs file 114 ₂, a 1920×1080 8 Mbs file 114 ₃, a 1280×720 5 Mbs file 114 ₄, a 1280×720 4 Mbs file 114 ₅, a 1280×720 3 Mbs file 114 ₆, a 720×480 2.2 Mbs file 114 ₇, a 720×480 1.8 Mbs file 114 ₈, a 720×480 1.4 Mbs file 114 ₉, a 640×360 900 Kbs file 114 ₁₀, a 400×224 600 Kbs file 114 ₁₁, and a 400×224 300 Kbs file 114 ₁₂.

The segmenting device 110 is configured to receive the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ and then segment each of the files 114 ₁, 114 ₂, 114 ₃, 114 ₄, 114 ₅, 114 ₆, 114 ₇, 114 ₈, 114 ₉, 114 ₁₀, 114 ₁₁, and 114 ₁₂ into multiple segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n). Each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) contains video and audio packets for a predetermined time duration (e.g., 10 seconds). It should be appreciated that the segmented files 116 _(a1-n) have a higher quality (higher bit rate) than segmented files 116 _(b1-n) which in turn have a higher quality (higher bit rate) than segmented files 116 _(c1-n) and so on where the segmented files 116 _(l1-n) have the lowest quality (lowest bit rate). The recording device 100 c receives the multiple sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) from the segmenting device 110. A detailed description is provided next on how the recording device 100 c is configured to store these segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) to provide the network-based personal video recording service 102 for the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) in accordance with the second embodiment of the present invention.

The recording device 100 c is shown as having a processor 118, a memory 120, multiple PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) and the general storage unit 124. The recording device 100 c can have additional well-known components but for clarity only the components needed to explain the present invention are described herein. The recording device 100 c is configured such that the processor 118 interfaces with the memory 120 and executes processor-executable instructions stored in the memory 120 to enable the following operations:

1. Receiving a record message 126 ₁ from an end-user device 128 ₁ (e.g., set-top-box computer, laptop computer, mobile phone (smart phone), tablet, internet capable television) associated with user 104 ₁ (for example)(see FIG. 4C's receiving step 402 c). In practice, the recording device 100 c would receive record messages 126 ₁, 126 ₂, 126 ₃ . . . 126 _(n) from the end-user devices 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) (e.g., set-top-box computers, laptop computers, mobile phones (smart phones), tablets, internet capable televisions) respectively associated with users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). In this example, the record message 126 ₁ contains a request to record the broadcast content 112 from 9:00 AM-9:30 AM for user 104 ₁. The record message 126 ₂ contains a request to record the broadcast content 112 from 9:00 AM-9:45 AM. The record message 126 ₃ contains a request to record the broadcast content 112 from 9:20 AM-9:30 AM. And, the record message 126 _(n) contains a request to record the broadcast content 112 from 9:08 AM-??.??, where the user 104 _(n) selected the record button on channel Z (broadcast content 112) at 9:08 AM and ??.?? is when the user 104 _(n) selects the stop button. In one embodiment, the recording device 100 c can receive a “prescheduled” record message 126 ₁ from user 104 ₁ (or any other user 104 ₂, 104 ₃ . . . 104 _(n)) where the “prescheduled” record message 126 ₁ contains a request to record the broadcast content 112 in the future by indicating a particular start time and a particular end time.

2. Storing all of the sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) corresponding to the requested broadcast content 112 within the network PVR 122 ₁ associated with user 104 ₁ and within the other network PVRs 122 ₂, 122 ₃ . . . 122 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) that also requested to record the broadcast content 112 (see FIG. 4C's storing step 404 c). In this example, the recording device 100 c would store the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) in the network PVR storage unit 122 ₁ associated with user 104 ₁ from 9:00 AM-9:30 AM. Plus, the recording device 100 c would store the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) in the network PVR storage unit 122 ₂ associated with user 104 ₂ from 9:00 AM-9:45 AM. In addition, the recording device 100 c stores the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) in the network PVR storage unit 122 ₃ associated with user 104 ₃ from 9:20 AM-9:30 AM. The recording device 100 c also stores the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n) from 9:08 AM-??.??. Once, user 104 _(n) stops the recording of the broadcast content 112 then the recording device 100 c stops storing the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) and 116 _(l1-n) in the network PVR storage unit 122 _(n) associated with user 104 _(n). At the same time the recording device 100 c is performing storing step 404 c it is also generating manifests 130 ₁′, 130 ₂′, 130 ₃′ . . . 130 _(n)′ respectively for users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n). The manifests 130 ₁′, 130 ₂′, 130 ₃′ . . . 130 _(n)′ respectively have individual references 132 _(1-x) to each of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n), and 116 _(l1-n) associated with the broadcast content 112 in the corresponding network PVR storage units 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) for time periods of 9:00 AM-9:30 AM for user 104 ₁, 9:00 AM-9:45 AM for user 104 ₂, 9:20 AM-9:30 AM for user 104 ₃, and 9:08 AM-??.?? for user 104 _(n).

3. Once the recording sessions stop for all of the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) who had requested to record the broadcast content 112 then the recording device 100 c performs following operations (see FIG. 4C's step 406 c):

-   -   3a. Identifying common segmented files that have been stored in         the network PVR 122 ₁ associated with the user 104 ₁ and in the         other network PVRs 122 ₂, 122 ₃ . . . 122 _(n) associated with         other users 104 ₂, 104 ₃ . . . 104 _(n) (see FIG. 4C's step 406         c 1).     -   3b. Determining which of the users 104 ₁, 104 ₂, 104 ₃ . . . 104         _(n) that has longest recording session for the broadcast         content 112 (see FIG. 4C's step 406 c 2). In this example,         assume user 104 ₂ has the longest recording session for the         broadcast content 112.

3c. Deleting all of the identified common segmented files except for one set of segmented files 116 _(l1-n) (for example) which are stored in the network PVRs 122 ₁, 122 ₃ . . . 122 _(n) (not PVR 122 ₂) associated with the users 104 ₁, 104 ₃ . . . 104 _(n) that did not have the longest recording session for the broadcast content 112 (see FIG. 4C's step 406 c 3).

4. Re-writing the unique manifests 130 ₁′, 130 ₃′ . . . 132 _(n)′ associated with users 104 ₁, 104 ₃ . . . 104 _(n) that did not have the longest recording session for the broadcast content 112 (see FIG. 4C's step 408 c). In this example, the re-written unique manifest 130 ₁ has references 132 _(1-x) to (1) segmented files associated with the one set of segmented files 116 _(l1-n) which are stored in the network PVR storage unit 122 ₁ associated with user 104 ₁, and (2) to at least a portion of the identified common segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the network PVR storage unit 122 ₂ associated with user 104 ₂ that has the longest recording session (note: the at least a portion of the identified common segmented files do not include the one set of segmented files which are stored in the network PVR storage unit 122 ₁ associated with user 104 ₁). Further, the re-written unique manifest 130 ₃ has references 132 _(1-x) to (1) segmented files associated with the one set of segmented files 116 _(l1-n) which are stored in the network PVR storage unit 122 ₃ associated with user 104 ₃, and (2) to at least a portion of the identified common segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the network PVR storage unit 122 ₂ associated with user 104 ₂ that has the longest recording session (note: the at least a portion of the identified common segmented files do not include the one set of segmented files which are stored in the network PVR storage unit 122 ₃ associated with user 104 ₃). Plus, the re-written unique manifest 130 _(n) has references 132 _(1-x) to (1) segmented files associated with the one set of segmented files 116 _(l1-n) which are stored in the network PVR storage unit 122 _(n) associated with user 104 _(n), and (2) to at least a portion of the identified common segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the network PVR storage unit 122 ₂ associated with user 104 ₂ that has the longest recording session (note: the at least a portion of the identified common segmented files do not include the one set of segmented files which are stored in the network PVR storage unit 122 _(n) associated with user 104 _(n)). The manifest 130 ₂′ for user 104 ₂ would not be re-written.

5. Sending the unique manifest 130 ₁ to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 4C's step 410 c). In this example, the recording device 100 c also sends unique manifests 130 ₂′, 130 ₃ . . . 130 _(n) to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) (note: the unique manifest 130 _(n) would be sent to user 104 _(n) upon the completion of the recording process which is when user 104 _(n) stops the recording). FIG. 4A graphically illustrates steps 1-5 while FIG. 4B graphically illustrates the following steps 6-9.

6. Receiving a play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 4C's receiving step 412 c). The play-back message 136 ₁ includes one of the references 132 ₁ (for example) in the unique manifest 130 ₁. FIG. 4B illustrates the recording device 100 c receiving the play-back message 136 ₁ from the end-user device 128 ₁ associated with user 104 ₁. For clarity, the recording device 100 a shown in FIG. 4B does not illustrate the recording device 100 a receiving play-back messages 136 ₂, 136 ₃ . . . 136 _(n) from end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). In addition, FIG. 4B does not illustrate the recording device 100 a interacting with and streaming the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n). However, it should be appreciated that the recording device 100 a interacts with and streams the requested segmented files of the recorded broadcast content 112 to the end-user devices 128 ₂, 128 ₃ . . . 128 _(n) associated with users 104 ₂, 104 ₃ . . . 104 _(n) in the same manner as it does with user 104 ₁.

7. Using the one reference 132 ₁ in the play-back message 136 ₁ to retrieve a corresponding segmented file 116 _(a1) (for example) from either the PVR storage unit 122 ₁ associated with user 104 ₁ or from PVR storage unit 122 ₃ depending on which storage unit 122 ₁ or 122 ₃ is actually storing the requested segmented file 116 _(a1) (see FIG. 4C's step 414 c). In this example, the recording device 100 c would retrieve the segmented file 116 _(a1) from PVR storage unit 122 ₂ since it is not stored in the PVR storage unit 122 ₁ associated with user 104 ₁. This is a marked-improvement over the prior art since the PVR storage unit 122 ₁ no longer has to store all of the segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n).

8. Sending the retrieved segmented file 116 _(a1) to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 4C's sending step 416 c).

9. Repeating the second receiving operation (step 6) by receiving play-back messages 136 ₂, 136 ₃, 136 ₄ . . . 136 _(n) with references 132 ₂, 132 ₃, 132 ₄ . . . 132 _(n), the using operation (step 7) to retrieve segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) (for example), and the second sending operation (step 8) by sending the retrieved segmented files 116 _(b2), 116 _(b3), 116 _(c4) . . . 116 _(jn) of the broadcast content 112 in a sequential manner to the end-user device 128 ₁ associated with user 104 ₁ (see FIG. 4C's repeating step 418 c).

9. Deleting the (1) one set of segmented files 116 _(l1-n) (for example) which are stored in the specific PVR storage unit 122 ₁ associated with user 104 ₁, and (2) the remaining sets of segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n) which are stored in the PVR storage unit 122 ₂ (assuming all other users 104 ₂, 104 ₃ . . . 104 _(n) have deleted the recorded broadcast content 112) after receiving a delete request 139 ₁ from user 104 ₁ (see FIG. 4C's deleting step 420 c).

Note: The description above relates to providing the network-based personal video recording service 102 for one user 104 ₁ but it should be appreciated that the same steps can be performed by the recording device 100 c to provide the network-based personal video recording service 102 for any number of users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) each of which have their own end-user device 128 ₁, 128 ₂, 128 ₃ . . . 128 _(n) and each of which can record the same broadcast content 112 (e.g., channel Z) or different broadcast content (e.g., channels A-Y) at the same time or different times.

In view of the foregoing description, one skilled in the art will readily appreciate that the present invention is a marked improvement over the state-of-the-art since for each user 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) who wishes to record broadcast content 112 the recording device 110 records at a minimum a single bit rate (segmented files 116 _(k1-n)) of the broadcast content 112 within each user's network PVR storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n). The recording device 100 also stores the other bit rates (segmented files 116 _(a1-n), 116 _(b1-n), 116 _(c1-n), 116 _(d1-n), 116 _(e1-n), 116 _(f1-n), 116 _(g1-n), 116 _(h1-n), 116 _(i1-n), 116 _(j1-n), 116 _(k1-n)) in a central storage location 124 (first and second embodiments) or some other storage location (third embodiment). In any embodiment, the users 104 ₁, 104 ₂, 104 ₃ . . . 104 _(n) are confined to only viewing broadcast content 112 that they have individually recorded (should they only record ten minutes of a program then that is all they can see). The recording device 100 has many advantages some of which are as follows (for example):

-   -   The recording device 100 eliminates certain inefficiencies by         keeping one network copy (single bit rate) for each user 104 ₁,         104 ₂, 104 ₃ . . . 104 _(n) in their respective network PVR         storage unit 122 ₁, 122 ₂, 122 ₃ . . . 122 _(n) while still         keeping to existing laws.     -   The recording devices 100 a and 100 b also keeps the “user         initiated” clause of existing laws.     -   The recording device 100 a has the advantage of allowing complex         and robust behavior in a single system with the least amount of         waste by storing only manifest data and a single bitrate (one         set of segmented files) in each network PVR storage unit 122 ₁,         122 ₂, 122 ₃ . . . 122 _(n).

Although multiple embodiments of the present invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it should be understood that the invention is not limited to the disclosed embodiments, but instead is also capable of numerous rearrangements, modifications and substitutions without departing from the present invention that as has been set forth and defined within the following claims. 

The invention claimed is:
 1. A system for providing a network-based personal video recording service for a plurality of users, the system comprising: a plurality of personal video recorder storage units; wherein the system is configured to: receive a record message from an end-user device associated with one user of the plurality of users, wherein the record message contains a request to record a broadcast content; store a plurality of sets of segmented files associated with the broadcast content, wherein each one of the sets of segmented files has a bitrate that is different than bitrates of the remaining sets of the segmented files; generate a unique manifest for the one user, wherein the unique manifest has references to segmented files associated with (1) one of the sets of segmented files stored in one of the personal video recorder storage units associated with the one user, and (2) the remaining sets of segmented files stored in a storage unit other than the personal video recorder storage unit associated with the one user; and send the unique manifest to the end-user device associated with the one user.
 2. The system of claim 1, wherein the system is further configured to: receive a play-back message from the end-user device of the one user, wherein the play-back message includes one of the references in the unique manifest; use the one reference in the play-back message to retrieve a corresponding segmented file from either the personal video recorder storage unit associated with the one user or from the storage unit; send the retrieved segmented file to the end-user device; and repeat the second receive operation, the use operation, and the second send operation to provide requested segmented files of the recorded broadcast content in a sequential manner to the end-user device.
 3. The system of claim 1, wherein the system is further configured to: delete the one set of segmented files stored in the personal video recorder storage unit associated with the one user, and the remaining sets of segmented files which are stored in the storage unit.
 4. The system of claim 1, wherein: the storage unit is a general storage unit; and the system is further configured such that after receipt of the record message the store operation is started where the one of the sets of segmented files are stored in the personal video recorder storage unit associated with the one user, and when not already being stored begin to store the remaining sets of segmented files in the general storage unit.
 5. The system of claim 4, wherein the record message contains a prescheduled record request to record the broadcast content during a particular start time and end time.
 6. The system of claim 4, wherein the system is further configured to perform the store operation as follows: determine, upon receiving the record message from the end-user device of the one user, whether the broadcast content is currently being stored in the general storage unit; based on a result of the determining operation being no, begin to store the remaining sets of segmented files of the broadcast content in the general storage unit; after beginning to store the remaining sets of segmented files of the broadcast content in the general storage unit or based on a result of the determine operation being yes, begin to store the one of the sets of segmented files of the broadcast content in the personal video recorder storage unit associated with the one user; and after beginning to store the one of the sets of segmented files of the broadcast content in the personal video recorder storage unit associated with the one user, increment a general recording count for the broadcast content to indicate number of users recording the broadcast content.
 7. The system of claim 4, wherein the system is further configured to stop the store operation as follows: determine, after an end time has been reached for recording the broadcast content for the one user, whether a general recording count is at one indicating that the one user is the only user that was recording the broadcast content; based on a result of the determine operation being yes, stop the storing of the remaining sets of segmented files in the general storage unit; after the stopping of the storing of the remaining sets of segmented files in the general storage unit or based on a result of the determine operation being no, stop the storing of the one of the sets of segmented files in the personal video recorder storage unit associated with the one user; and after the stopping of the storing of the one of the sets of segmented files in the personal video recorder storage unit associated with the one user, stop the generation of the unique manifest for the one user, and decrement the general recording count by one for the broadcast content.
 8. The system of claim 4, wherein the system is further configured to: receive a delete message from the end-user device associated with the one user, wherein the delete message contains a request to delete the recorded broadcast content associated with the one user; delete the unique manifest of the one user; delete the one set of segmented files stored in the personal video recorder storage unit associated with the one user; determine whether the one user has permission for stored segmented files in the general storage unit that none of the remaining users can access; based on a result of the determine operating being yes, delete the stored segmented files in the general storage unit that none of the remaining users can access; and based on a result of the determine operating being no, do not delete the stored segmented files in the general storage unit that none of the remaining users can access.
 9. The system of claim 1, wherein: the storage unit is a general storage unit; and the system is further configured such that before receiving the record message at least the remaining sets of segmented files are already being stored in the general storage unit, and after receiving the record message the one of the sets of segmented files are started to be stored in the personal video recorder storage unit associated with the one user.
 10. The system of claim 1, wherein: the storage unit is one of the personal video recorder storage units which is not associated with the one user; the system is further configured to: wherein the store operation includes storing the plurality of sets of segmented files in the personal video recorder storage unit associated with the one user and in one or more of the personal video recorder storage units associated with one or more other users that also requested to record the broadcast content; after recording sessions stop for the one user and the one or more other users that requested to record the broadcast content then: identify common segmented files that have been stored in the personal video recorder storage unit associated with the one user and in the one or more of the personal video recorder storage units associated with one or more other users; determine which of the one user or the one or more other users that has longest recording session for the broadcast content; delete all of the identified common segmented files except for the one of the sets of segmented files which are stored in the personal video recorder storage units associated with the one user or the one or more other uses that did not have the longest recording session for the broadcast content; and the generate operation includes re-writing the unique manifest associated with the one user when the one user is not the user that has the longest recording session for the broadcast content such that the re-written unique manifest has references to segmented files associated with the one set of segmented files which are stored in the personal video recorder storage unit associated with the one user, and such that the re-written unique manifest has references to at least a portion of the identified common segmented files which are stored in the personal video recorder storage unit associated with the user that has the longest recording session, wherein the at least a portion of the identified common segmented files do not include the one set of segmented files which are stored in the personal video recorder storage unit associated with the one user.
 11. A method implemented in a system for providing a network-based personal video recording service for a plurality of users, wherein the system comprises a plurality of personal video recorder storage units, the method comprising: receiving a record message from an end-user device associated with one user of the plurality of users, wherein the record message contains a request to record a broadcast content; storing a plurality of sets of segmented files associated with the broadcast content, wherein each one of the sets of segmented files has a bitrate that is different than bitrates of the remaining sets of the segmented files; generating a unique manifest for the one user, wherein the unique manifest has references to segmented files associated with (1) one of the sets of segmented files stored in one of the personal video recorder storage units associated with the one user, and (2) the remaining sets of segmented files stored in a storage unit other than the personal video recorder storage unit associated with the one user; and sending the unique manifest to the end-user device associated with the one user.
 12. The method of claim 11, further comprising: receiving a play-back message from the end-user device of the one user, wherein the play-back message includes one of the references in the unique manifest; using the one reference in the play-back message to retrieve a corresponding segmented file from either the personal video recorder storage unit associated with the one user or from the storage unit; sending the retrieved segmented file to the end-user device; and repeating the second receiving step, the using step, and the second sending step to provide requested segmented files of the recorded broadcast content in a sequential manner to the end-user device.
 13. The method of claim 11, further comprising: deleting the one set of segmented files stored in the personal video recorder storage unit associated with the one user, and the remaining sets of segmented files which are stored in the storage unit.
 14. The method of claim 11, wherein: the storage unit is a general storage unit; and after receiving the record message, the storing step is started such that the one of the sets of segmented files are stored in the personal video recorder storage unit associated with the one user, and beginning to store the remaining sets of segmented files in the general storage unit when the remaining sets of segmented files are not already being stored in the general storage unit.
 15. The method of claim 14, wherein the storing step further comprises: upon receiving the record message from the end-user device of the one user, determining whether the broadcast content is currently being stored in the general storage unit; based on a result of the determining step being no, beginning to store the remaining sets of segmented files of the broadcast content in the general storage unit; after beginning to store the remaining sets of segmented files of the broadcast content in the general storage unit or based on a result of the determining step being yes, beginning to store the one of the sets of segmented files of the broadcast content in the personal video recorder storage unit associated with the one user; and after beginning to store the one of the sets of segmented files of the broadcast content in the personal video recorder storage unit associated with the one user, incrementing a general recording count for the broadcast content to indicate number of users recording the broadcast content.
 16. The method of claim 14, wherein the storing step is stopped as follows: determining, after an end time has been reached for recording the broadcast content for the one user, whether a general recording count is at one indicating that the one user is the only user that was recording the broadcast content; based on a result of the determining step being yes, stopping the storing of the remaining sets of segmented files in the general storage unit; after the stopping of the storing of the remaining sets of segmented files in the general storage unit or based on a result of the determining step being no, stopping the storing of the one of the sets of segmented files in the personal video recorder storage unit associated with the one user; and after the stopping of the storing of the one of the sets of segmented files in the personal video recorder storage unit associated with the one user, stopping the generation of the unique manifest for the one user, and decrementing the general recording count by one for the broadcast content.
 17. The method of claim 14, further comprising a step of deleting the stored broadcast content by: receiving a delete message from the end-user device associated with the one user, wherein the delete message contains a request to delete the recorded broadcast content associated with the one user; deleting the unique manifest of the one user; deleting the one set of segmented files stored in the personal video recorder storage unit associated with the one user; determining whether the one user has permission for stored segmented files in the general storage unit that none of the remaining users can access; based on a result of the determining step being yes, deleting the stored segmented files in the general storage unit that none of the remaining users can access; and based on a result of the determining step being no, do not delete the stored segmented files in the general storage unit that none of the remaining users can access.
 18. The method of claim 11, wherein: the storage unit is a general storage unit; and before receiving the record message, storing at least the remaining sets of segmented files in the general storage unit and after receiving the record message starting to store the one of the sets of segmented files in the personal video recorder storage unit associated with the one user.
 19. The method of claim 11, wherein: the storage unit is one of the personal video recorder storage units which is not associated with the one user; the storing operation includes storing the plurality of sets of segmented files in the personal video recorder storage unit associated with the one user and in one or more of the personal video recorder storage units associated with one or more other users that also requested to record the broadcast content; after recording sessions stop for the one user and the one or more other users that requested to record the broadcast content then: identifying common segmented files that have been stored in the personal video recorder storage unit associated with the one user and in the one or more of the personal video recorder storage units associated with one or more other users; determining which of the one user or the one or more other users that has longest recording session for the broadcast content; deleting all of the identified common segmented files except for the one of the sets of segmented files which are stored in the personal video recorder storage units associated with the one user or the one or more other uses that did not have the longest recording session for the broadcast content; and the generating step includes re-writing the unique manifest associated with the one user if the one user is not the user that has the longest recording session for the broadcast content such that the re-written unique manifest has references to segmented files associated with the one set of segmented files which are stored in the personal video recorder storage unit associated with the one user, and such that the re-written unique manifest has references to at least a portion of the identified common segmented files which are stored in the personal video recorder storage unit associated with the user that has the longest recording session, wherein the at least a portion of the identified common segmented files do not include the one set of segmented files which are stored in the personal video recorder storage unit associated with the one user.
 20. A non-transitory computer readable medium comprising computer readable code, when run in a system having a plurality of personal video recorder storage units causes the system to perform the following steps: receiving a record message from an end-user device associated with one user of the plurality of users, wherein the record message contains a request to record a broadcast content; storing a plurality of sets of segmented files associated with the broadcast content, wherein each one of the sets of segmented files has a bitrate that is different than bitrates of the remaining sets of the segmented files; generating a unique manifest for the one user, wherein the unique manifest has references to segmented files associated with (1) one of the sets of segmented files stored in one of the personal video recorder storage units associated with the one user, and (2) the remaining sets of segmented files stored in a storage unit other than the personal video recorder storage unit associated with the one user; and sending the unique manifest to the end-user device associated with the one user. 